Houjun Sun

A Highly Integrated W -Band 16-Element Phased-Array Transceiver in 40-nm CMOS

Jiazhi Ying, Zhiwei Zhou, Zhiqiang Zhao, Zunxiang Wang et autres

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Microwave Vortex Beam Lasing via Photonic Time Crystals

Lei Huang, Weixuan Zhang, Deyuan Zou, Jiacheng Bao et autres

Microwave lasing carrying orbital angular momentum (OAM) holds significant potential for advanced applications in fields such as high-capacity communications, precision sensing, and radar imaging. However, conventional approaches to masers fail to produce emission with embedded OAM. The recent emergence of photonic time …

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A Compact TM 01 -to-TE 10 THz Mode Transducer With High Suppression of Spurious Modes

Wenjie Zong, Yu Xiao, Xiuming Tang, Kaiqiang Zhu et autres

In this letter, a high-mode-purity TM01-to-TE10mode transducer operating at 340 GHz is designed, which has great potential in terahertz (THz) power combining. A compact configuration and high mode purity are realized through the integration of a five-step septum and an impedance matching …

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Design of an Ultra-Compact and Broadband C–X -Band Wilkinson Power Divider/Combiner in 65-nm CMOS Technology

Jiazhi Ying, Yikun Wang, Zhiwei Zhou, Zunxiang Wang et autres

This article presents an ultra-compact and broadband Wilkinson power divider/combiner (WPDC) designed for large-scale phased arrays. To minimize the chip area, a shortened transmission line (T-line) topology using a metal-stacked inductor is introduced into the two stages. Furthermore, to address the isolation …

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Complex-Amplitude Janus Metasurface for Asymmetric 3-D Holography

Pengcheng Tang, Qianqian Yuan, Rong Niu, Weiren Zhu et autres

Metasurface holography has emerged as a transformative technology with significant potential in information encryption, virtual displays, and high-capacity data storage. However, developing a holographic display system with ultrahigh information capacity and multidimensional multiplexing remains a major challenge. To address this issue, we …

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Design of a Wideband THz 2-D Spatial Power Combiner Based on Mode Conversion Method

Zhenjun Zhai, Feng Lin, Kaiqiang Zhu, Houjun Sun et autres

This article presents a wideband terahertz (THz) 2-D${M} \times {M}$spatial power combiner (SPC) based on a mode conversion method. It consists of a transmitting array, a transmitarray (TA), and a receiving antenna, which are integrated in a sealed metal cavity. The TA …

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Design and implementation of the RF front-end for ultra-wideband and high-sensitivity signal reception

Shengfa Xu, Q. Li, Xiongjun Fu, Houjun Sun et autres

To address two key challenges in ultra-wideband (UWB) receiver design-strong clutter interference in UWB RF signals and the low sensitivity of conventional front-ends-this paper proposes a high-sensitivity UWB RF signal reception front-end and details its design and implementation. Utilizing a frequency-segmentation-based structure, …

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Transmission–reflection-integrated metasurface for full-space, six-channel, and polarization-multiplexed holography

Genhao Wu, Pengcheng Tang, Rong Niu, Chenyang Dang et autres

This paper presents a transmission–reflection-integrated metasurface (TRIM) that enables six fully independent holographic channels across the entire spatial domain, enabled by polarization multiplexing in one transmission and two reflection pathways. The metasurface architecture combines orthogonal receiving–transmitting elements for efficient forward transmission with …

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Eavesdropping risk in terahertz channels by coverings on wavy surfaces

Peian Li, Wenbo Liu, Jiabiao Zhao, Jiayuan Cui et autres

Terahertz communications offer unprecedented data rates for next-generation wireless networks but suffer from blockage susceptibility that restricts coverage and introducse physical-layer security vulnerabilities. Non-line-of-sight relay schemes using metallic wavy surfaces (MWS) address coverage limitations but require concealment beneath indoor materials for practical …

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Self-Supervised Enhanced Imaging Network for Sparse Cross MIMO Arrays

Guangnan Xing, Shiyong Li, Ahmad Hoorfar, Qiang An et autres

In millimeter-wave imaging, the focusing performance of sparse multiple-input-multiple-output (MIMO) arrays is susceptible to various noise interferences during the propagation of electromagnetic waves. In addition, the sparse array imaging based on the traditional compressive sensing algorithms suffers from low computational efficiency due …

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D-Band Hairpin Filters Based on TGV Technology

Pengyang Lv, Zhaoying Li, Kaiyue Liu, Liming Si et autres

This paper focuses on the design of a D-band hairpin filter based on Through-Glass Via (TGV) technology. As a essential part of the millimeter-wave band, the D band (110–170 GHz) has broad application prospects in fields such as 5G, 6G communications, radar …

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Hybrid Neural Network-Driven Inverse Design of Metasurface for Ultrabroadband RCS Reduction

Rong Niu, Weiren Zhu, Xiue Bao, Kaiqiang Zhu et autres

An inverse design approach based on hybrid artificial intelligence (AI) network is proposed for designing a metasurface with ultra-broadband radar cross section (RCS) reduction. The metasurface comprises 1-bit coded unit cells designed by a tandem neural network (TNN), which enables efficient inverse …

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